On 02 Mar 2005, john Smith wrote

Hello

Im going to be tiling the front of my bath which I have made from
12mm marine ply (as discussed a few months back)

It was also said to seal it with diluted PVA to stop the tile
adhesive soaking in to the wood to quickly.

What ratio water to PVA is it.

It's often listed on the PVA container; the last time I did some
sealing -- of some previously-untreated artex, before painting -- it
recommended 5 parts water to 1 part PVA.

--
Cheers,
Harvey